Tangaek — Decoctions · Grains
無灰酒 Jae An Neoheun Sul (재 안 넣은 술)
Muhoeju is liquor with nothing added to it. Brewers once stirred a little ash into wine to keep it from turning sour, and this is the wine that went without, hence 'ashless.' The Donguibogam defines it in a single line: unmixed liquor, nothing more.
Original, read line by line 東醫寶鑑 · Tangaek — Decoctions vol. 1
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不雜他物者, 卽醇酒也.
It is liquor with nothing else mixed in — that is, pure liquor.
HomiclubAsh was sometimes stirred into liquor to keep it from souring, and liquor left without it was called muhoe, "no ash." This was the liquor taken as the standard for medicinal use.
Grains — more entries
This is a cultural and historical record from a classical text, not a claim about any food’s effects. Nothing here is a health supplement or intended to prevent or treat disease. Consult a medical professional about health concerns. · Text: Korean Medicine Classics DB · Reading: Homiclub